The Avengers actor has said that he does not want to continue in the Marvel Studios role of Tony Stark indefinitely.

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Referring to his recent Iron Man 3on-set injury, he told GQ: "It got me thinking about how big the message from your cosmic sponsor needs to be before you pick it up.

"How many genre movies can I do? How many follow-ups to a successful follow-up are actually fun?

"Because, as quiet as it's kept, I come from a family of very innovative writers and directors and actors and artists, and the circle of friends they were in were the people I heard having pun-offs playing poker at two in the morning, and it was just the most comforting aspect of my childhood.

"So there's this kind of legacy of souls from what I consider to be a very particular time in entertainment, and I'm sensing a return to that - it's what me and the missus are doing next."

He said that he is unsure about how long his superhero roles can last.

"I don't know. I don't know," he said. "Right now I don't have a contract to do anything, and I did for the last five years."